Fermaid K

Fermaid K

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A complex formula that provides DAP, free amino acids, yeast hulls, unsaturared fatty acids, sterols, and micronutrients such as magnesium sulfate, thiamin, folic acid, biotin, calcium pantothenate, and other vitamins and minerals. Yeast use Nitrogen for protein synthesis and to maintain cellular growth. Nitrogen from the alpha amino acids contained in Fermaid K is utilized much more efficiently than from the ammonia salts. The unsaturated fatty acids and sterols available in Fermaid K are important survival factors needed to maintain alcohol resistance. They also help keep volatile acidity levels low. The cell wall fractions, available through the included yeast hulls, absorb medium chain fatty acids that are toxic to the yeast. They also provide nucleation sites to help keep the yeast in suspension. Fermaid K is normally used in conjunction with GO-Ferm and added to the fermenting wine after 1/3 sugar depletion. Our Winemaking consultant Shea Comfort uses the analogy of a marathon to describe when to use nutrients. GO-Ferm is the snack before the race and Fermaid K is the mid-race power bar that gets your yeast through a healthy, problem-free ferment. It is a formula used by hundreds of commercial wineries. You do not need to add any additional fertilizers or DAP when adding Fermaid K. Use approximately 1 gram per gallon. Rehydrate in distilled water.

A rough approximate of weight is 1 tsp = 4.7 grams. We highly recommend using a scale to weigh the product for an accurate dose. We do not recommend relying on these rough conversions for accurate dosage rates.

Like Fermaid K? Then you will love CellarScience® FermFed Yeast Nutrient!


Community Q&A

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Browse 4 questions Browse 4 questions and 8 answers
Why did you choose this?
MoreFlavor Store
Sounded like a good idea
Mathew M on Mar 5, 2023
Fermaid O and Fermaid K in every batch of mead.
JEFFERY S on Feb 13, 2023
Sounded like a good idea
Mathew M on Mar 5, 2023
suggested as part of a late ferment
Benjamin S on Feb 20, 2023
Fermaid O and Fermaid K in every batch of mead.
JEFFERY S on Feb 13, 2023
Ran out
Valued C on Feb 8, 2023
Basically red bull for yeast.
Clifton Lawson on Jan 28, 2023
Add nitrogen to fermentation
James K on Jan 26, 2023
Experience - what I had is old.
Hugh F. H on Jan 19, 2023
feeding the yeast to make better beer
James P on Jan 7, 2023
tried and true product
karl w on Jan 4, 2023
yeast hydration, wine making
Jerold J C on Dec 31, 2022
My mead and maple wine are fermenting way too slow.
Derek P on Dec 23, 2022
Stephen S on Dec 20, 2022
Want to learn brewing.
Valued C on Dec 17, 2022
up my game
Jeff on Dec 17, 2022
To help the fermentation process
Jeffrey B on Dec 7, 2022
I have always has excellent results with this product for mead making.
Norman B on Dec 5, 2022
Vicky R on Dec 3, 2022
First try to make white wine .
Minji K on Dec 2, 2022
Yeast needs nutrients
Steven J on Oct 21, 2022
worked well for me in the past
Chad T on Oct 12, 2022
Mildred B on Oct 11, 2022
An option for yeast nutrient.
Alan F on Oct 7, 2022
to assist the feeding
DANIEL SCOTT B on Oct 1, 2022
it has always provided reliable fermentation
David P on Sep 29, 2022
Same as above
Warren W on Sep 25, 2022
recommendation of wine guide and description
Thomas P on Sep 24, 2022
James R Dishman I on Sep 23, 2022
Yeast nutrient is always helpful
Steven J on Sep 23, 2022
Jeff B on Sep 14, 2022
Recommended by MoreWine! red winemaking guide
Josh T on Sep 9, 2022
Other wine makers have recommended its use
GEORGE Y on Sep 7, 2022
Have used previously
John W on Sep 2, 2022
I've found inorganic nitrogen provides better support in stressful conditions (e.g. after 1/3 down) or when selected yeast have higher nutrient requirements.
John Overholt on Sep 2, 2022
Recommendation from someone
Tony D on Aug 22, 2022
Recommendation from someone
Tony D on Aug 22, 2022
Keep yeast happy
Luke J on Aug 17, 2022
Used it before
David Stephens on Aug 10, 2022
es bueno
Continues a good nutrient stream
Alvin B on Jul 27, 2022
got to have a good ferment
PAUL P on Jul 26, 2022
My standard procedure making mead
Wanna make mead
Tanner A on Jul 14, 2022
Making mead
Alan B on Jul 13, 2022
Recommended and I like to grow my yeast
Dave H on Jul 13, 2022
Diane Rudnick on Jul 8, 2022
Used for 10+years
Rich R on Jul 6, 2022
Never used before
Steve A on Jun 28, 2022
I've used before
Michael G on Jun 27, 2022
I get a higher % of alcohol and a drier wine when I use this.
JEREMY F. on Jun 23, 2022
Just want to help out the yeast a little.
MTMachinist on Jun 10, 2022
suggested as part of a late ferment
Benjamin S on Feb 20, 2023
Ran out
Valued C on Feb 8, 2023
Is this product Kosher certified?
Noam Zeev on Sep 7, 2022
Use approximately 1 gram Fermaid K per gallon of what? Must or projected juice?
Karen Wall on Oct 8, 2021
BEST ANSWER: We recommend one gram per gallon of must.
Is this product from Canada?
Noam Zeev on Sep 7, 2022
BEST ANSWER: Yes. This originates from Scott Labs in Canada.
Is the amount of Fermaid K that you add to the wine must directly correlated to YAN?
Peter M. Christie on Jan 25, 2021
BEST ANSWER: 1 g/L of Fermaid K adds 100 PPM YAN.

Source: Advanced Nutrients in Meadmaking by Travis Blount-Elliot. Can't link it in the answer but the white paper is available free online.

4.5 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 2 out of 5
It's not bad, but I won't use it again. I gave it two stars because it is what I ordered and it arrived quickly, but I'm not impressed with the results.
June 15, 2022
1 year ago
Rated 5 out of 5
always works great ...........
October 6, 2021
over 2 years ago
Rated 5 out of 5
Fermaid K in the yeast starter for Red Wine.
A good healthy active yeast starter is essential to ensure as short a lag time as possible. Even though the must was at 68 degrees my roaring starter had the airlock bubbling at 4 hrs. This gives me peace of mind after tending the vineyard all year long.
October 3, 2021
over 2 years ago
Rated 5 out of 5
Great yeast food!
High quality product. Clean and works as described.
August 7, 2021
over 2 years ago
Rated 5 out of 5
great stuff...can't imagine starting a fermentation without it
November 12, 2020
over 2 years ago
Rated 4 out of 5
Great for starting fruit wines. I like this better than Go Ferm but I have used them both together. Go Ferm is rather nasty to mix and smelly and I try to avoid using too many chemicals.
September 21, 2020
over 4 years ago
Rated 5 out of 5
Good for high brick, and yeasts with high nitrogen needs.
September 7, 2020
over 3 years ago
Rated 4 out of 5
Good food for the yeast, a little goes a long way.
This was my first time using this. Used for 3 batches of beer. Seems to help. However, as it is recommend to be added when 1/3 of the sugar content happens, that's a bit hard to estimate. Otherwise, good stuff.
June 27, 2020
over 3 years ago
Rated 4 out of 5
Overall excellent product. Would be even better if the smaller quantities came in a resealable vial or bag.
February 25, 2020
over 3 years ago
Rated 5 out of 5
Great yeast booster!
I added 1/2 the amount of Fermaid K once Fermentation started and the other 1/2 at 5 brix.
October 14, 2019
over 4 years ago